hard20 pts · first answer countsfreertosinterrupts

FromISR call from a high priority ISR

An ISR set to NVIC priority 0 calls xQueueSendFromISR, and the system crashes randomly. configMAX_SYSCALL_INTERRUPT_PRIORITY is set to 5. What is wrong?

A.xQueueSendFromISR cannot be used with queues longer than 1B.Priority 0 is reserved for SysTickC.Queues cannot be used from any ISRD.ISRs that call FreeRTOS APIs must have a priority numerically equal to or above 5, so the kernel can mask them

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FromISR call from a high priority ISR

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